OP seems to be AWOL, so if anyone wants to DIY this mod, here are the parts:
Universal socket housing uncoded This is the connector that goes into the exhaust flap actuator to protect it from corrosion. This part number doesn't include the cavity plugs. I'm trying to find a part number for the cavity plugs, but you could use silicon caulking.
Dummy flap actuator This is the dummy plug that is connected to the wiring harness to prevent a code. This connector has a resistor across pins 1 & 3.
Here is info from TIS on the exhaust flap:
Electrical exhaust flap
2020 M2C DCT Hockenheim Silver Metallic
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